Using Standard Output With the ufsdump Command

When you specify a dash (-) as the dump-file argument, the ufsdump command writes to
standard output.

Note –

The -v option (verify) does not work when the dump-file argument is standard output.

You can use the ufsdump and ufsrestore commands
in a pipeline to copy a file system by writing to standard output with the ufsdump command and reading from standard input with the ufsrestore command. For example: